0.87 Ct. Blue Sapphire from Australia

This exceptional transparent 0.87 carat marquise shaped blue sapphire measures 8.76 x 4.53 x 2.84 millimeters, and it has a mixed brilliant cut, a clarity grade described as very very slightly included when evaluated at eye level, dark color intensity, and an excellent polish. The stone has been heat treated, a widely accepted and stable enhancement that improves color saturation and reduces the visibility of internal characteristics without compromising the fundamental durability of corundum. Origin is Australia, a source known for producing intensely saturated, deep blue sapphires, and this provenance contributes to the gems appeal for collectors who appreciate traceable origins. The marquise outline, combined with the mixed brilliant faceting, has been executed to balance fire and scintillation while preserving strong color depth, and the polished facets return light in a way that emphasizes the stones blue without introducing unwanted flashiness. For an educated buyer, these objective specifications are important because they define how the sapphire will perform in jewelry, how it will age and respond to daily wear, and how it fits within market expectations for heat treated natural sapphires from a reputable source.

From a gemological perspective the combination of very very slightly included clarity and excellent polish is notable because it means that under normal viewing conditions the stone will appear clean and lively, while under magnification it will still show natural features that confirm its origin and natural formation. The dark color intensity in a high quality sapphire can be both a strength and a consideration, because while deeper saturation yields a rich, velvety blue prized by many connoisseurs, it can also subtly reduce the apparent face up size compared to lighter stones of the same carat weight. The mixed brilliant cut on this marquise has been chosen to optimize return of light in spite of strong saturation, and the polish quality ensures that light passes through and reflects from the facets with minimal surface disruption. Heat treatment is the standard enhancement for the vast majority of fine sapphires, and it is stable and permanent when properly applied, therefore this stone delivers enhanced color in a way that is consistent with industry practices. Buyers who value provenance will appreciate the Australian origin, because Australian sapphires often present a distinctive deep blue character that complements the cut and finish present here, and The Natural Sapphire Company stands behind the gem with clear disclosure of treatment and origin to support confidence in purchase.

When set in jewelry the rich deep blue of this marquise sapphire offers versatile and flattering color interactions across a wide range of skin tones, and thoughtful design choices will amplify the stones strengths. On fair skin the dramatic contrast created by a dark, saturated blue produces a striking and elegant statement, and a white metal setting such as platinum or white gold will emphasize the cool, crisp aspects of the blue while a halo of small diamonds will increase perceived brightness and apparent size. For warm or olive complexions the blue will harmonize beautifully, because deep cornflower and navy blues act as neutral anchors that complement golden undertones, and a yellow gold or rose gold mounting can introduce warmth that balances the stones coolness without diminishing its saturation. On darker skin tones the intense blue reads as luminous and regal, and the marquise silhouette is particularly effective at creating visual elongation on the hand when set in a solitaire or three stone design, presenting an elegant profile that is both modern and timeless. Practical setting recommendations for this marquise include secure prong work that protects the pointed ends, or a partial bezel to safeguard the tips while allowing light to enter the crown, and a halo or side stones will enhance dispersion and create contrast that makes the dark blue appear more vivid. If you prefer a bespoke setting, The Natural Sapphire Company can advise on metal choice, stone orientation, and complementary diamond or colored gem accents to achieve your desired aesthetic and performance, and we encourage you to request additional imagery, measurements, or independent laboratory reporting to support your evaluation prior to purchase.